富水砂层中浅埋偏压大断面暗挖车站隧道方案适应性研究

ADAPTABILITY STUDY OF TUNNEL SCHEME FOR LARGE SECTION SUBMERGED EXCAVATION STATION WITH SHALLOW BURIED BIAS IN WATER-RICH SAND LAYER

依托某地铁车站暗挖隧道施工为案例,对城市富水砂层中浅埋偏压大断面暗挖地铁车站的“先盾构后隧道”与“先隧道后盾构”2个方案进行浅析,主要介绍了2种方案的施工原则,并结合实际情况对2个方案的适应性进行分析,为此类相似案例提供参考。

Relying on the construction of a subway station undercutting tunnel as a case,the two schemes of"shield first,tunnel after"and"shield after tunne" for the shallow buried and biased large section underground excavated subway station in the urban water-rich sand layer were analyzed.This paper mainly introduces the construction principles of the two schemes,and analyzes the adaptability of the two schemes based on the actual situation,and provides a reference for selection of such similar cases.